Effect of ray irradiation on deoxidation in aqueous solution by hydrazine

水溶液中におけるヒドラジンの溶存酸素除去に対する線の効果

本岡 隆文; 佐藤 智徳  ; 山本 正弘 

Motooka, Takafumi; Sato, Tomonori; Yamamoto, Masahiro

水溶液へのヒドラジン添加による溶存酸素低減作用に対する放射線の影響を明らかにするため、微量のヒドラジンを含有する純水及び人工海水に線を室温照射した。非照射下では溶存酸素低減作用は小さかったが、線を照射すると著しく低減作用は増大した。室温のプール水への微量ヒドラジンの添加は、溶存酸素低減策として有効と考えられる。

The effect of ray irradiation on deoxidation in aqueous solution by hydrazine was investigated using pure water and artificial sea water at room temperature. We placed the solutions with small amount of hydrazine at ray irradiation field at dose rates of 0.3-7.5 kGy/h. The concentration of dissolved oxygen in the solutions was measured before and after ray irradiation. Concentration of dissolved oxygen was not decreased without ray irradiation, while concentration of dissolved oxygen was markedly decreased for one hour ray irradiation, which is under detection limit at higher dose rate over 2 kGy/h. It is believed that the hydrazine addition to spent nuclear fuel pool water is effective as a method for decreasing concentration of dissolved oxygen.